Tellurian



(No Moo'lelJ-Hl l G. A. HENDERSON.

TELLURIAN.

No. 261,603. Patented lJuly'l', 1882.

N. PETERS. PhulmLnhoguplm. wnhingtun. D. c.

UNITED STATES GEORGE A. HENDERSON, OF DEOATUR, ILLINOIS.

TELLuRlAN.

SPECIFICATION forming part of Letters Patent No. 261,603, dated July 25, 1882.

Application lcd February 15, 1882. (No model.)

To all 'whom it may concern Beit known that I, GEORGE A.HNDERsoN, a citizen of the United States, residing at De Ycatur, in the county of Macon and State of eclipses, and for the solution of many problems occurring in this branch of study. I attain these objects by the device illustrated in the accompanying drawings, in whichf Figure lis a side elevation of the tellurian complete. Fig. 2 is a sectional view of the mechanism attached to the end ofthe bracket upon whichv the globes representing the earth and'moon are mounted.

Similar letters refer to similar parts throughout the several views.

A is a gilt globe or ball, representingthe sun, and is mounted upon the top of the standard D', which rises from a pedestal,l), said stand-V ard being provided with the tixed band-wheels G, H, and I.

F is a sleeve fitted loosely onto the standard, its lower end resting upon the pedestal, and is provided with a milled head, F', by means of which it is turned. To one side of this sleeve is secured the bracket E, at the outer end of which is a sleeve or socket, E', adapted to receive and support the mechanism which operates the earth and moon. Within this socket E is fitted to revolve the sleeve N, provided with a band-wheel, K, the hub of which rests upon the upper end of the socket. At the upper end of this sleeve N an arm, R, is secured, provided with a small rod, S, attached toits outer end in an inclined position, to indicate the inclination of the earths equator vto the ecliptic.

The earth-globe B is provided with a tube, T, which is adapted to pass over the rod S, and

is provided with a milled head which rests upon the disk O, as shown, so that by a circular movement of the disk O an axial movement is given lto the earth.

M is a sleeve tted so as torevolve around on the sleeve N, between the arm R and wheel K, upon which it rests. The sleeve M is prol PATENT OEEICE. wm Q vided with a small band-wheel, J, and a curved arm, m, which supports the moon.

Pisa small shaft, lit-ted to revolve within the sleeve N, the upper end of which is provided with a ilat disk, 0,and its llower end with a small band-wheel, L, on a line with and connected with the lower fixed wheel, G, by av band or cord, a.

The details of construction being described,

the operation is as follows: -In order, first, to rotate the earth and moon around the sun, the bracket E is moved around the standard surmounted by the sun-globe A by simply turning the milled head F with hand either to the right or to thelet't, as desired. By the sweep of the bracket, all of the mechanism is operated through the medium of the bands a, a', and a", connecting with the fixed wheels and the corresponding movablewheels at the end ot' said bracket. Each individual movement ot' the 'earth and moon is obtained as follows: The

which passes around the iiXed wheel H of the, standard, thence around the band-wheel K,

which is actuated by the sweep of the bracket, while the arm R, which supports the earth, is in an inclined position, by means ot which any given direction of the pole is maintained, its direction being only very slightly varied by the precession of equinoxcs, the procession of equinoxes being obtained by a slight difterence in the diameterof theband-wheels H and K and by a succession ot' revolutions of the earth around the sun.A The axial movement of the earth is obtained by the band a passing around the iixed wheel G and around the small band-wheel L, secured to the lower end of the shaft P, as showwn, and by the circular movement of the arm or bracket E the shaft P and its disk O is revolved, thus causing .the earth to revolve upon its own axis through the me dium of the milled head t, which is secured to the earth-pole in such a manner as to rest upon the disk O, from which it receives its motion.

IOO

The moon is revolved around the earth by the band a passing around the fixed wheel 1 and around the smaller wheel J, the band a being crossed, so as to produce a circular movement of the moon in reverse direction to the polar movement ofthe earth.

In order that it may he more clearly understood in what relation the iixed wheels G and II stand to each other and to the movable wheels L and Kin producing the three distinct movements ofthe earth, as hereinbefore described, first, for example, say the band a, be thrown od', the sweep of the bracket around the standard will only produce a polar movement of the earth, and not an axial movement; and, again, by replacing the band a, and throwing off the band a and moving the bracket as before I still have only a polar movement, as there is no resistance to the circular movement of the sleeve N, to which the axis of the earth is attached, and it is caused to revolve by the friction of the shaft P and the hub of the disk O, which rests upon said sleeve.- It will be obvious, therefore, that the fixed wheel H and the movable wheel K perform three distinct functions in connection with G and L, first, in producing a polar movement of the earth; secondly, in ali'ording a resistance against the movement of the mechanism which produces the axial movement ofthe earth; and, thirdly, by a slight increase inthe diameter of the wheel K over the wheel H an illustration of the procession of equinoxes is produced and only made apparent by asuccession of revolutions of the bracket E around the sun.

0n the upper face of the iixed wheel G are graduations showing the signs ot' the zodiac, the months and days ot' the year; and upon the bracket is secured an indicator, e, for indicating the position ofthe earth in the heavens during the diiferent seasons of the year.

The dilt'erentparts of the apparatus are made removable, so that they may be readily detached from each other and reduced to a compact form for convenience in transportation and storage.

I am aware that tellurians have been eonstructed in which the earth and moon globes are supported at the extremity of an arm and operated by the rotation of that arm around a central supporting-axis, which also carries the sun-globe or a lamp. I therefore do not claim such construction, broadly.

What I claim, and desire to secure by Letters Patent, is-- l. In a tellurian having pedestal D and tixed standard D', carrying sun-globe A, the oombination, with these. of the earth and moon supporting bracket E and sleeve F, provided with milled head Ff, as shown and described.

2. In a tellurian, the sleeve F, provided with milled head F and earth-bracket E, having earth and moon globes and operating mechanism at its outer end, and provided with indicator e, in combination with pedestal D and standard D', and the stationary graduated band-wheel Gr and band a, as shown and described.

3. In a tellurian having pedestalDand fixed standard D', supporting sun-globe A, and provided with fixed band-wheels G H, the combination, with these, ofthe bracket E, projecting from sleeve E, having milled head, and provided with sleeve N, carrying the earthglobe, the shaft I), and band-wheels K L at its outer end, and the bands,a a, adapted, when the bracket is rotated round the sun-globe, to illustrate, because of the difference in size of wheels H K, the procession of the equinoxes, substantially as shown and described.

4. In a tellurian, the fixed band-wheel G, band a, and standard D', in combination with wheel L and shaft P, the sleeve N, supporting globe B, and the bracket E, sleeve F, and head F', operating to impart by the friction of said shaft and sleeve more rapid polar motion to the earth-globe, whereby an additional set ot' planetary movements may be illustrated, as and for the purpose specilied.

GEO. A. HENDERSON.

Attest:

S. F. GREEK, C. L. WAGGONER. 

